Rewrite std::string("") to std::string(), Linux edition.

chrome/browser/extensions/api/content_settings/content_settings_apitest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/prefs/pref_service.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/content_settings/cookie_settings.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 #include "chrome/browser/extensions/api/content_settings/content_settings_api.h"
 #include "chrome/browser/extensions/extension_apitest.h"
@@ skipping 56 matching lines @@
             map->GetContentSetting(example_url,
                                    example_url,
                                    CONTENT_SETTINGS_TYPE_NOTIFICATIONS,
                                    std::string()));
 
   // Check content settings for www.google.com
   GURL url("http://www.google.com");
   EXPECT_FALSE(cookie_settings->IsReadingCookieAllowed(url, url));
   EXPECT_EQ(CONTENT_SETTING_ALLOW,
             map->GetContentSetting(
-                url, url, CONTENT_SETTINGS_TYPE_IMAGES, ""));
+                url, url, CONTENT_SETTINGS_TYPE_IMAGES, std::string()));
   EXPECT_EQ(CONTENT_SETTING_BLOCK,
             map->GetContentSetting(
-                url, url, CONTENT_SETTINGS_TYPE_JAVASCRIPT, ""));
+                url, url, CONTENT_SETTINGS_TYPE_JAVASCRIPT, std::string()));
   EXPECT_EQ(CONTENT_SETTING_BLOCK,
             map->GetContentSetting(
-                url, url, CONTENT_SETTINGS_TYPE_PLUGINS, ""));
+                url, url, CONTENT_SETTINGS_TYPE_PLUGINS, std::string()));
   EXPECT_EQ(CONTENT_SETTING_ALLOW,
             map->GetContentSetting(
-                url, url, CONTENT_SETTINGS_TYPE_POPUPS, ""));
+                url, url, CONTENT_SETTINGS_TYPE_POPUPS, std::string()));
 #if 0
   EXPECT_EQ(CONTENT_SETTING_BLOCK,
             map->GetContentSetting(
                 url, url, CONTENT_SETTINGS_TYPE_GEOLOCATION, ""));
 #endif
   EXPECT_EQ(CONTENT_SETTING_BLOCK,
             map->GetContentSetting(
-                url, url, CONTENT_SETTINGS_TYPE_NOTIFICATIONS, ""));
+                url, url, CONTENT_SETTINGS_TYPE_NOTIFICATIONS, std::string()));
 }
 
 // Flaky on the trybots. See http://crbug.com/96725.
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest,
                        DISABLED_ContentSettingsGetResourceIdentifiers) {
   CommandLine::ForCurrentProcess()->AppendSwitch(
       switches::kEnableExperimentalExtensionApis);
 
   base::FilePath::CharType kFooPath[] =
       FILE_PATH_LITERAL("/plugins/foo.plugin");
@@ skipping 21 matching lines @@
       SetPluginsForTesting(&plugins);
 
   EXPECT_TRUE(RunExtensionTest("content_settings/getresourceidentifiers"))
       << message_;
 
   ContentSettingsContentSettingGetResourceIdentifiersFunction::
       SetPluginsForTesting(NULL);
 }
 
 }  // namespace extensions